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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_MATHML_MATHML_ELEMENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_MATHML_MATHML_ELEMENT_H_
#include <optional>
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/mathml_names.h"
#include "third_party/blink/renderer/platform/geometry/length.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
namespace blink {
class CSSPrimitiveValue;
class CSSToLengthConversionData;
class QualifiedName;
class CORE_EXPORT MathMLElement : public Element {
DEFINE_WRAPPERTYPEINFO();
public:
MathMLElement(const QualifiedName& tagName,
Document& document,
ConstructionType constructionType = kCreateMathMLElement);
~MathMLElement() override;
bool HasTagName(const MathMLQualifiedName& name) const {
DCHECK_EQ(name.NamespaceURI(), namespaceURI());
return HasLocalName(name.LocalName());
}
bool IsMathMLElement() const =
delete; // This will catch anyone doing an unnecessary check.
bool IsStyledElement() const =
delete; // This will catch anyone doing an unnecessary check.
virtual bool IsGroupingElement() const { return false; }
protected:
bool IsPresentationAttribute(const QualifiedName&) const override;
void CollectStyleForPresentationAttribute(
const QualifiedName&,
const AtomicString&,
HeapVector<CSSPropertyValue, 8>&) override;
enum class AllowPercentages { kYes, kNo };
const CSSPrimitiveValue* ParseMathLength(
const QualifiedName& attr_name,
AllowPercentages allow_percentages = AllowPercentages::kYes,
CSSPrimitiveValue::ValueRange value_range =
CSSPrimitiveValue::ValueRange::kAll);
std::optional<Length> AddMathLengthToComputedStyle(
const CSSToLengthConversionData&,
const QualifiedName&,
AllowPercentages allow_percentages = AllowPercentages::kYes,
CSSPrimitiveValue::ValueRange value_range =
CSSPrimitiveValue::ValueRange::kAll);
void ParseAttribute(const AttributeModificationParams&) override;
// https://w3c.github.io/mathml-core/#dfn-boolean
std::optional<bool> BooleanAttribute(const QualifiedName& name) const;
};
template <>
struct DowncastTraits<MathMLElement> {
static bool AllowFrom(const Node& node) { return node.IsMathMLElement(); }
};
inline bool Node::HasTagName(const MathMLQualifiedName& name) const {
auto* mathml_element = DynamicTo<MathMLElement>(this);
return mathml_element && mathml_element->HasTagName(name);
}
} // namespace blink
#include "third_party/blink/renderer/core/mathml_element_type_helpers.h"
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_MATHML_MATHML_ELEMENT_H_
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